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SEGMENT INFORMATION (DETAILS) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Revenue, Major Customer [Line Items]      
Intersegment sales $ 22,936 $ 21,933 $ 25,370
Intersegment eliminations 0 0 (20,499)
Total net sales 22,936 21,933 25,370
Operating income: 793 355 230
Interest expense: 1 9 24
Depreciation and amortization expense: 557 586 670
Capital expenditure: 73 319 355
Total assets: 15,776 15,352  
Long-lived assets: 1,213 1,769  
Metal Stamping and Mechanical Oem [Member]
      
Revenue, Major Customer [Line Items]      
Unaffiliated customers 13,820 14,646 14,689
Intersegment sales 0 0 8,585
Total net sales 13,820 14,646 23,274
Operating income: 527 319 428
Interest expense: 1 6 14
Depreciation and amortization expense: 306 353 393
Capital expenditure: 44 210 323
Total assets: 10,452 10,022  
Long-lived assets: 796 1,142  
Electric [Member]
      
Revenue, Major Customer [Line Items]      
Unaffiliated customers 9,116 7,287 10,681
Intersegment sales 0 0 11,914
Total net sales 9,116 7,287 22,595
Operating income: 352 142 71
Interest expense: 0 3 10
Depreciation and amortization expense: 251 233 277
Capital expenditure: 29 109 32
Total assets: 4,859 5,228  
Long-lived assets: 417 627  
Corporate [Member]
      
Revenue, Major Customer [Line Items]      
Operating income: (86) (106) (269)
Total assets: $ 465 $ 102